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Microphone stand thread: 5/8 vs 15mm
I always thought the convention for a microphone stand thread was 5/8 – 27 (extra fine thread; the standard industrial sizes being 5/8 – 11 for coarse thread and 5/8 – 18 for fine thread).
However, I recently came across a type of microphone stand that uses a 15mm thread (and when I say I came across it, I mean I bought it and discovered the thread was not a match).
Is 15mm a newer standard, or is it only used in other parts of the world? If there are two coexisting standards now (5/8-27 and 15mm), are there any adaptors to convert from one to the other?